Acoustics

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= Acoustics = Some important concepts related with acoustics to understand how acoustics works. First we need to know a lit it bit of sound and what are his elements.
 * Sound:** it is created with objects in vibration that produce the vibration of the air cause by the compression and rarefaction of air. Sound travels in invisible waves and can be measured and studied.
 * Speed:** is a distant in unit time. This is refer to the waves speed and waves can move really fast even on speed of light like the radio waves.
 * Frequency:** is the number of completed waves in one second. This is a measure (Hertz) and it can be calculated with this equation. F= cycles (a complete waves)/ time.
 * Wavelength:** distant between matching points on the waves. Waves can travel in a long or short distance it depend on the speed of the waves.


 * There are two types of waves:**
 * Longitudinal:** went the vibration is parallel to the direction of travel.
 * Transverse**: went the vibration is at a right angle to the direction of travel.



= Video: ideas and interesting aspects. = In this video we can see how are the waves in real life and a lot of examples of these. The waves have dimensions, long waves are created with big objects like drums and they create low frequency. By the other hand, small objects create small waves and they travel on high frequency, a very good example of this are the radio signals. Another aspect of the video is the impulsive sounds there are a lot of examples there, like clapping hands and braking things, those sounds are created impulsively. Here the sound energy is big so the sound is laud but really fast.